The rates are comprised of Generic Dutch government bonds. The underlying benchmark bonds (2 years and above) are located under {YCGT0020 <Index> DES<GO>} 2<GO> for "Members". These yields are based on the bid side of the market and are updated intraday. To view all terms/securities type {ALLX GNTH<GO>}. Pricing source: BGN. The generic will not update if we do not have rates for the underlying benchmark bonds, or if we do not have the underlying terms on the curve.